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Finding the Fourth Proportional to 553,905.70, 831,186.60 and 403,768.15

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Solution

The fourth proportional to 553,905.70, 831,186.60 and 403,768.15 is: 605,891.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,905.70 : 831,186.60 = 403,768.15 : x
  2. Step 2: Convert to fraction form
    553,905.70/831,186.60 = 403,768.15/x
  3. Step 3: Cross multiply
    553,905.70x = 831,186.60 × 403,768.15
  4. Step 4: Simplify right side
    553,905.70x = 335,606,675,786.79
  5. Step 5: Solve for x
    x = 335,606,675,786.79/553,905.70
  6. Step 6: Final answer
    x = 605,891.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.